garrett



R. E. BARRETT.` I

Patented Aug.. 5, 1919.

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' fz' /4. hr1/wrm? REG/WIWI??? index pointer or stem 30,- passingtherethrough andprojecting below the index lever in order that it may beinserted in fthe perforations in the index plate, and -at its upper end,above the top of the post, a cap .3l is iixed to the stem. A guide' nutB2 is threaded into the upper open 'end of the post land this nutl isalsocentrally bored to accommodate thestem which passes there# throughand is guided in the nut.. Withinl the hollow post a protraetile spring33 is coiled about the stem having its upper end bearing against theunder-side o'f the guidev nut, and its lower end bears against the11p--l per face of a collar 34 lixedon the stem.

Thus when it is desired to revolve the work fora successive out, thestem is withdrawn from the perforated disk by pulling up on the cap ofthe stem, against the ten sion of the spring yin the post, and* vwhen,the stem or pointer has .been` withdrawn` from the perforation the levermay be turned the distance between two perforations, and

the stein or'pointer iS then permitted to be projected into theperforation'.

A guide i001 for the plate 01! disk isshown at 35, which has a hub 37that may be clamped 'about the sleeve of the lever by the screw 36. Thefriction however between the guide andthe sleeve is notl suflicient tocause the guide to turn with the lever, for the j guide is set' ahead ofthe stem to register with a certa-in perforation in the series, and

then the lever is moved up to this point as a guide. i It will beevident that the pointer may be inserted in the perforations of the fourcircles shown, depending upon the number of teeth to be out, and it isevident that the post and stem may be slid in on`the slotted levertoward its center of rotation, and there, in adjusted position, held bythe clamp nut or socket nut beneath the slotted lever.

1. lThe combination 'with a slotted index head, of a .perforated indexplate secured thereto, a lever revolubleon said plate and providedvwith-a pointer to engage the. perthe lever to engage perforations inthe plate, `and a mandrel for supporting a blank operated from saidshaft, there being' a screw on the shaft for operating the worm wheellon the mandrel.- f

'3. In `an indexing?I device the combination with a revoluble shaft andits bearing sleeve, ofen index plate, an index lever having a sleeveover said shaft, a threaded extension on the shaft and a securing nut inthe hub of the lever engaging said extension, and a pointer carriedby'said lever co-actingl with the index plate.

ln testimony whereof `affix my signature.

ROBERT E. GARRETT.

f I i

